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Can't purge the air out of the boiler!

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  • HomerJSmith
    HomerJSmith Member Posts: 2,447
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    Use a 3/4" Black Iron coupling.
  • Tinman
    Tinman Member Posts: 2,808
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    I know this air problem is new, but if you’re going to drain the system to make improvements, why not go all in?

    Install a good air separator on the supply, move the pump to the supply, pump away from the expansion tank and install a better backflow preventor and fill valve. Caleffi’s is hard to beat.
    Steve Minnich

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